Butterfly catchers was a derogatory term used to describe the more scientific-minded captains in the early Federation Starfleet.

The term was coined at a time when the direction of Starfleet wasn't yet established, and there was some strife between those captains who had been military veterans of the Earth-Romulan War, and those who were scientists. The war veterans felt that the scientists didn't have what it takes to command a starship, as they knew nothing of space combat. The two groups were eventually able to reconcile and work together as a unified whole. (ST novel: Starfleet: Year One)

By the 24th century, the term had fallen into general disuse. Dr. Edward La Forge once referred to himself jokingly as a "butterfly catcher" during the USS Zee-Magnees's investigation of the planet Aralsee II. (TNG - Slings and Arrows eBook: The Insolence of Office)

Community content is available under CC-BY-SA unless otherwise noted.